Examples with RetryTemplate cn.taketoday.retry.support.RetryTemplate used on opensource projects

Example 11 with RetryTemplate

use of cn.taketoday.retry.support.RetryTemplate in project today-infrastructure by TAKETODAY.

the class StatisticsListenerTests method testStatelessSuccessful.

@Test
public void testStatelessSuccessful() throws Throwable {
    RetryTemplate retryTemplate = new RetryTemplate();
    retryTemplate.setListeners(new RetryListener[] { listener });
    for (int x = 1; x <= 10; x++) {
        MockRetryCallback callback = new MockRetryCallback();
        callback.setAttemptsBeforeSuccess(x);
        retryTemplate.setRetryPolicy(new SimpleRetryPolicy(x));
        retryTemplate.execute(callback);
        assertEquals(x, callback.attempts);
        RetryStatistics stats = repository.findOne("test");
        // System.err.println(stats);
        assertNotNull(stats);
        assertEquals(x, stats.getCompleteCount());
        assertEquals((x + 1) * x / 2, stats.getStartedCount());
        assertEquals(stats.getStartedCount(), stats.getErrorCount() + x);
    }
}

Example 12 with RetryTemplate

use of cn.taketoday.retry.support.RetryTemplate in project today-infrastructure by TAKETODAY.

the class StatisticsListenerTests method testStatefulSuccessful.

@Test
public void testStatefulSuccessful() throws Throwable {
    RetryTemplate retryTemplate = new RetryTemplate();
    retryTemplate.setListeners(new RetryListener[] { listener });
    RetryState state = new DefaultRetryState("foo");
    for (int x = 1; x <= 10; x++) {
        MockRetryCallback callback = new MockRetryCallback();
        callback.setAttemptsBeforeSuccess(x);
        retryTemplate.setRetryPolicy(new SimpleRetryPolicy(x));
        for (int i = 0; i < x; i++) {
            try {
                retryTemplate.execute(callback, state);
            } catch (Exception e) {
            // don't care
            }
        }
        assertEquals(x, callback.attempts);
        RetryStatistics stats = repository.findOne("test");
        // System.err.println(stats);
        assertNotNull(stats);
        assertEquals(x, stats.getCompleteCount());
        assertEquals((x + 1) * x / 2, stats.getStartedCount());
        assertEquals(stats.getStartedCount(), stats.getErrorCount() + x);
    }
}

Example 13 with RetryTemplate

use of cn.taketoday.retry.support.RetryTemplate in project today-infrastructure by TAKETODAY.

the class StatefulRetryIntegrationTests method testExponentialBackOffIsExponential.

@Test
public void testExponentialBackOffIsExponential() throws Throwable {
    ExponentialBackOffPolicy policy = new ExponentialBackOffPolicy();
    policy.setInitialInterval(100);
    policy.setMultiplier(1.5);
    RetryTemplate template = new RetryTemplate();
    template.setBackOffPolicy(policy);
    final List<Long> times = new ArrayList<Long>();
    RetryState retryState = new DefaultRetryState("bar");
    for (int i = 0; i < 3; i++) {
        try {
            template.execute(new RetryCallback<String, Exception>() {

                public String doWithRetry(RetryContext context) throws Exception {
                    times.add(System.currentTimeMillis());
                    throw new Exception("Fail");
                }
            }, new RecoveryCallback<String>() {

                public String recover(RetryContext context) throws Exception {
                    return null;
                }
            }, retryState);
        } catch (Exception e) {
            assertTrue(e.getMessage().equals("Fail"));
        }
    }
    assertEquals(3, times.size());
    assertTrue(times.get(1) - times.get(0) >= 100);
    assertTrue(times.get(2) - times.get(1) >= 150);
}

Example 14 with RetryTemplate

use of cn.taketoday.retry.support.RetryTemplate in project today-infrastructure by TAKETODAY.

the class StatefulRetryIntegrationTests method testExternalRetryWithSuccessOnRetryAndSerializedContext.

@Test
public void testExternalRetryWithSuccessOnRetryAndSerializedContext() throws Throwable {
    MockRetryCallback callback = new MockRetryCallback();
    RetryState retryState = new DefaultRetryState("foo");
    RetryTemplate retryTemplate = new RetryTemplate();
    RetryContextCache cache = new SerializedMapRetryContextCache();
    retryTemplate.setRetryContextCache(cache);
    retryTemplate.setRetryPolicy(new SimpleRetryPolicy(2));
    assertFalse(cache.containsKey("foo"));
    Object result = "start_foo";
    try {
        result = retryTemplate.execute(callback, retryState);
        // The first failed attempt we expect to retry...
        fail("Expected RuntimeException");
    } catch (RuntimeException e) {
        assertNull(e.getMessage());
    }
    assertTrue(cache.containsKey("foo"));
    result = retryTemplate.execute(callback, retryState);
    assertFalse(cache.containsKey("foo"));
    assertEquals(2, callback.attempts);
    assertEquals(1, callback.context.getRetryCount());
    assertEquals("bar", result);
}

Example 15 with RetryTemplate

use of cn.taketoday.retry.support.RetryTemplate in project today-framework by TAKETODAY.

the class FatalExceptionRetryPolicyTests method testFatalExceptionWithState.

@Test
public void testFatalExceptionWithState() throws Throwable {
    MockRetryCallback callback = new MockRetryCallback();
    callback.setExceptionToThrow(new IllegalArgumentException());
    RetryTemplate retryTemplate = new RetryTemplate();
    Map<Class<? extends Throwable>, Boolean> map = new HashMap<Class<? extends Throwable>, Boolean>();
    map.put(IllegalArgumentException.class, false);
    map.put(IllegalStateException.class, false);
    SimpleRetryPolicy policy = new SimpleRetryPolicy(3, map);
    retryTemplate.setRetryPolicy(policy);
    RecoveryCallback<String> recoveryCallback = new RecoveryCallback<String>() {

        public String recover(RetryContext context) throws Exception {
            return "bar";
        }
    };
    Object result = null;
    try {
        retryTemplate.execute(callback, recoveryCallback, new DefaultRetryState("foo"));
        fail("Expected IllegalArgumentException");
    } catch (IllegalArgumentException e) {
    // If stateful we have to always rethrow. Clients who want special
    // cases have to implement them in the callback
    }
    result = retryTemplate.execute(callback, recoveryCallback, new DefaultRetryState("foo"));
    // Callback is called once: the recovery path should also be called
    assertEquals(1, callback.attempts);
    assertEquals("bar", result);
}